D‑U‑N‑S Numbers are often referenced by lenders and potential business partners to help predict the reliability and/or financial stability of the company in question. A DUNS number records your business record of how you pay your vendors, if there are any delinqient or up to date accounts, Based off that information they will decided if they want to do business with you. 
 
Why you need a DUNS?
A DUNS is what all lenders look for a business to have before approving them for major funds
A Duns Number is sometime asked for by banks and institutions before you make a business account with them.  If you don't have one you can't house with that bank or institution
A Duns Number to lenders look like you have an professional, legitmate business and that you're organized in the business world. 
 
D‑U‑N‑S Numbers are often referenced by lenders and potential business partners to help predict the reliability and/or financial stability of the company in question. D‑U‑N‑S, which stands for data universal numbering system, is used to maintain up-to-date and timely information on more than hundreds of millions global businesses.
 
The D‑U‑N‑S Number also enables identification of relationships between corporate entities (hierarchies and linkages), another key element of Live Business Identity and commercial risk assessment practices.